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Finding the Fourth Proportional to 245,124.60, 367,686.90 and 78,912.60

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Solution

The fourth proportional to 245,124.60, 367,686.90 and 78,912.60 is: 118,368.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,124.60 : 367,686.90 = 78,912.60 : x
  2. Step 2: Convert to fraction form
    245,124.60/367,686.90 = 78,912.60/x
  3. Step 3: Cross multiply
    245,124.60x = 367,686.90 × 78,912.60
  4. Step 4: Simplify right side
    245,124.60x = 29,015,129,264.94
  5. Step 5: Solve for x
    x = 29,015,129,264.94/245,124.60
  6. Step 6: Final answer
    x = 118,368.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.